// 
//  Copyright 2011  comphilip
// 
//    Licensed under the Apache License, Version 2.0 (the "License");
//    you may not use this file except in compliance with the License.
//    You may obtain a copy of the License at
// 
//        http://www.apache.org/licenses/LICENSE-2.0
// 
//    Unless required by applicable law or agreed to in writing, software
//    distributed under the License is distributed on an "AS IS" BASIS,
//    WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
//    See the License for the specific language governing permissions and
//    limitations under the License.
using System;
using System.Collections.Generic;
using Dict4Engkoo.Result;
using Debug = System.Diagnostics.Debug;

namespace Dict4Engkoo.Command {
	internal class ShowCommand : ICommand {
		private static readonly Dictionary<string, ICommand> childCommands;

		static ShowCommand(){
			ShowDBCommand db = new ShowDBCommand();
			ShowStratCommand strat = new ShowStratCommand();
			ShowInfoCommand info = new ShowInfoCommand();
			ShowServerCommand server = new ShowServerCommand();
			
			childCommands = new Dictionary<string, ICommand> (StringComparer.OrdinalIgnoreCase){
				{"DB", db},
				{"DATABASES", db},
				{"STRAT", strat},
				{"STRATEGIES", strat},
				{"INFO", info},
				{"SERVER", server}
			};
		}
		
		public IResult Process (DictContext Context) {
			Debug.Assert (Context != null, "Null DictContext");
			if (Context.CommandParameters.Length <= 0)
				return CommonResults.IllegalParameters;
			
			ICommand childCmd;
			if (childCommands.TryGetValue (Context.CommandParameters[0], out childCmd)) {
				return childCmd.Process (Context);
			}
			
			return CommonResults.IllegalParameters;
		}
	}
}

